std::fma

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Numeri libreria

Comuni funzioni matematiche

Virgola mobile ambiente

I numeri complessi

Array numerici

Pseudo-casuale generazione

In fase di compilazione aritmetica razionale(C++11)

Generici operazioni numeriche Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

Comuni funzioni matematiche

Funzioni Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Operazioni di base Original: Basic operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod	remainder (C++11) remquo (C++11) fma (C++11) fmax (C++11) fmin (C++11) fdim (C++11) nan nanf nanl (C++11) (C++11) (C++11)
Funzioni esponenziali Original: Exponential functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
exp exp2 (C++11) expm1 (C++11)	log log10 log1p (C++11) log2 (C++11)
Funzioni di risparmio energia Original: Power functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sqrt cbrt (C++11)	hypot (C++11) pow
Funzioni trigonometriche e iperboliche Original: Trigonometric and hyperbolic functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11)

Errore e gamma funzioni Original: Error and gamma functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
erf (C++11) erfc (C++11)	lgamma (C++11) tgamma (C++11)
Più vicini operazioni di interi in virgola mobile Original: Nearest integer floating point operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ceil floor round lround llround (C++11) (C++11) (C++11)	trunc (C++11) nearbyint (C++11) rint lrint llrint (C++11) (C++11) (C++11)
Floating funzioni di manipolazione di punti Original: Floating point manipulation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ldexp scalbn scalbln (C++11) (C++11) ilogb (C++11) logb (C++11)	frexp modf nextafter nexttoward (C++11) (C++11) copysign (C++11)
Classificazione / confronto Original: Classification/Comparison The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fpclassify (C++11) isfinite (C++11) isinf (C++11) isnan (C++11) isnormal (C++11) signbit (C++11)	isgreater (C++11) isgreaterequal (C++11) isless (C++11) islessequal (C++11) islessgreater (C++11) isunordered (C++11)
Macro costanti Original: Macro constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
HUGE_VALF HUGE_VAL HUGE_VALL (C++11) (C++11) INFINITY (C++11) NAN (C++11) math_errhandling MATH_ERRNO MATH_ERREXCEPT (C++11)	FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C++11) (C++11) (C++11) (C++11) (C++11)

 

Elemento definito nell'header <cmath>
float       fma(float x, float y, float z );	(1)	(dal C++11)
double      fma(double x, double y, double z );	(2)	(dal C++11)
longdouble fma(longdouble x, longdouble y, longdouble z );	(3)	(dal C++11)
Promoted    fma( Arithmetic x, Arithmetic y, Arithmetic z );	(4)	(dal C++11)
#define FP_FAST_FMA  /* implementation-defined */	(5)	(dal C++11)
#define FP_FAST_FMAF /* implementation-defined */	(6)	(dal C++11)
#define FP_FAST_FMAL /* implementation-defined */	(7)	(dal C++11)

Le funzioni fma calcolare (x*y)+ z, arrotondato come un'operazione ternaria, secondo il

Original:

The fma functions compute (x*y)+ z, rounded as one ternary operation, according to the

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modalità di arrotondamento caratterizzato dal valore di FLT_ROUNDS.

Original:

rounding mode characterized by the value of FLT_ROUNDS.

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4)

Se un qualsiasi argomento è di tipo integrale, il cast double. Se qualsiasi altro argomento è longdouble, quindi il tipo di ritorno è longdouble, altrimenti è double.

Original:

If any argument has integral type, it is cast to double. If any other argument is longdouble, then the return type is longdouble, otherwise it is double.

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5-7)

Se le costanti macro FP_FAST_FMAF, FP_FAST_FMA o FP_FAST_FMAL sono definiti, il std::fma funzione valuta più veloce l'espressione x*y+z per float, double e argomenti longdouble, rispettivamente. Se definito, queste macro restituiscono 1 intero.

Original:

If the macro constants FP_FAST_FMAF, FP_FAST_FMA, or FP_FAST_FMAL are defined, the function std::fma evaluates faster than the expression x*y+z for float, double, and longdouble arguments, respectively. If defined, these macros evaluate to integer 1.

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Parametri

x, y, z

-

valori in virgola mobile Original: floating point values The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

(x*y)+ z, arrotondato come un'unica operazione ternaria

Original:

(x*y)+ z, rounded as one ternary operation

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Vedi anche

remainder (C++11)	firmato resto della divisione Original: signed remainder of the division operation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
remquo (C++11)	firmato restante nonché gli ultimi tre bit della operazione di divisione Original: signed remainder as well as the three last bits of the division operation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)